It connects Changshu and Taicang in the northeast and north, Jiading and Qingpu in Shanghai in the southeast and Wujiang and Suzhou in the west.
The maximum linear distance between east and west is 33 kilometers, and the maximum linear distance between north and south is 48 kilometers. The total area is 927.7 square kilometers, of which the land area is 64 1. 1 square kilometers and the water area is 286.6 square kilometers.